filename=`date +%Y%m%d`
/usr/bin/mysqldump -uroot -pz9WXOfTa#kGGHeMpb7eXT11fdQIfiMldFQBdZu3cJf sales >>/home/cn.hpchem/backup_data/$filename.sql

find /home/cn.hpchem/backup_data/ -mtime +10 -exec rm -rf {} \;
